While the typical situation envisioned here is the radiation from a hot object to its cooler surroundings, the Stefan-Boltzmann law is not limited to that case. If the surroundings are at a higher temperature (TC > T) then you will obtain a negative answer, implying net radiative transfer to the object.

= watts=calories/s = BTU/hr
After entering data, a calculation may be made by clicking on the highlighted symbol for the quantity you wish to calculate. A value for emissivity between 0 and 1 must be entered, with 1 representing a perfect radiator. The units for a given quantity will be reconciled when you enter data, but the relationship will not be forced to be consistent until you click on the quantity you desire to calculate.